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Title: Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane
Authors: Wu, P.
Bai, P. 
Lei, Z. 
Loh, K.P. 
Zhao, X.S. 
Keywords: Cyclohexane oxidation
Gold nanoparticle
Mesoporous silica
Issue Date: May-2011
Citation: Wu, P., Bai, P., Lei, Z., Loh, K.P., Zhao, X.S. (2011-05). Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane. Microporous and Mesoporous Materials 141 (1-3) : 222-230. ScholarBank@NUS Repository.
Abstract: Gold (Au) nanoparticles of sizes in the range of 2-4 nm dispersed on ordered mesoporous silica were prepared via a one-pot synthesis route in the presence of organosilane mercapto-propyl-trimethoxysilane (MPTMS). MPTMS was found to play a dual role: one was to coordinate the Au precursor (AuCl4-) via its thiol ligands and the other one was to form covalent bonds with the silica matrix. The interaction of the Au species with MPTMS was studied using real-time ultraviolet-visible spectroscopy and X-ray photoelectron spectroscopy techniques. The formation of Au (I)-thiolate complexes in the synthesis gel was identified and found to play a crucial role in the dispersion of the final Au nanoparticles on the support. The Au nanoparticles dispersed on the mesoporous silica exhibited high catalytic activity and selectivity in solvent-free selective oxidation of cyclohexane using molecular oxygen. © 2010 Elsevier Inc. All rights reserved.
Source Title: Microporous and Mesoporous Materials
ISSN: 13871811
DOI: 10.1016/j.micromeso.2010.11.011
Appears in Collections:Staff Publications

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